Main programm

mainwindow.h

#include <QMainWindow>
#include <ttest.h>

using namespace std;

namespace Ui {
class ddMainWindow;
}

class ddMainWindow : public QMainWindow
{
    Q_OBJECT

public:

    explicit ddMainWindow(QWidget *parent = 0);


    ~ddMainWindow();

private slots:
     void ShowInfo(int , off_t);


private:

        Ui::ddMainWindow *ui;
        Ttest *test; //point to thread

};

Q_DECLARE_METATYPE(off_t)

______________________________________________________________


mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

ddMainWindow::ddMainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::ddMainWindow)
{
    ui->setupUi(this);


        test = new Ttest(this);
	qRegisterMetaType<off_t>();
        QObject::connect(test, SIGNAL(changeVal(int, off_t)), SLOT(ShowInfo(int, off_t)), Qt::QueuedConnection);
        

}

ddMainWindow::~ddMainWindow()
{
    delete ui;
}

void ddMainWindow::ShowInfo(int progressVal, off_t time)
{
   ui->progressBar->setValue(progressVal);


}

void ddMainWindow::on_ddStartButton_clicked()
{
  test->start();
}
----------------------------------------------------------------------------
potok
ttest.h

#include <QThread>

class Ttest : public QThread
{
    Q_OBJECT
public:
    explicit Ttest(QObject *parent = 0);
    void run();

signals:

    void changeVal(int, off_t);


public slots:

};

----------------------------------------------

ttest.cpp

#include "ttest.h"

Ttest::Ttest(QObject *parent) :
    QThread(parent)
{
}

void Ttest::run()
{

    int pv = 0;
    off_t t = 0;
    for (int x=0; x < 100; x ++)
    {
      emit changeVal(pv, t);
      pv++;
      t++;
      sleep(1);

    }

}

main.cpp

#include "ddmainwindow.h"
#include <QApplication>

bool StopIndicator;

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    StopIndicator = false;
    ddMainWindow w;
    w.show();

    return a.exec();
}

ddmainwindow.dd

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>ddMainWindow</class>
 <widget class="QMainWindow" name="ddMainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>528</width>
    <height>414</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>ddMainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <widget class="QTableWidget" name="tableWidget">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>180</y>
      <width>411</width>
      <height>171</height>
     </rect>
    </property>
    <property name="rowCount">
     <number>3</number>
    </property>
    <property name="columnCount">
     <number>3</number>
    </property>
    <row/>
    <row/>
    <row/>
    <column/>
    <column/>
    <column/>
   </widget>
   <widget class="QPushButton" name="ddStartButton">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>70</y>
      <width>83</width>
      <height>24</height>
     </rect>
    </property>
    <property name="text">
     <string>start </string>
    </property>
   </widget>
   <widget class="QPushButton" name="fillTable">
    <property name="geometry">
     <rect>
      <x>430</x>
      <y>180</y>
      <width>91</width>
      <height>24</height>
     </rect>
    </property>
    <property name="text">
     <string>Update disks</string>
    </property>
   </widget>
   <widget class="QLineEdit" name="lineEditdest">
    <property name="geometry">
     <rect>
      <x>220</x>
      <y>40</y>
      <width>191</width>
      <height>22</height>
     </rect>
    </property>
   </widget>
   <widget class="QPushButton" name="destDialog">
    <property name="geometry">
     <rect>
      <x>410</x>
      <y>40</y>
      <width>41</width>
      <height>22</height>
     </rect>
    </property>
    <property name="text">
     <string>D</string>
    </property>
   </widget>
   <widget class="QPushButton" name="ddStopButton">
    <property name="geometry">
     <rect>
      <x>100</x>
      <y>70</y>
      <width>81</width>
      <height>22</height>
     </rect>
    </property>
    <property name="text">
     <string>Stop</string>
    </property>
   </widget>
   <widget class="QProgressBar" name="progressBar">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>120</y>
      <width>481</width>
      <height>23</height>
     </rect>
    </property>
    <property name="value">
     <number>0</number>
    </property>
   </widget>
   <widget class="QComboBox" name="comboBoxSrc">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>40</y>
      <width>191</width>
      <height>22</height>
     </rect>
    </property>
   </widget>
   <widget class="QLabel" name="labelSrc">
    <property name="geometry">
     <rect>
      <x>60</x>
      <y>20</y>
      <width>91</width>
      <height>16</height>
     </rect>
    </property>
    <property name="text">
     <string>Disk source</string>
    </property>
   </widget>
   <widget class="QLabel" name="labelDest">
    <property name="geometry">
     <rect>
      <x>240</x>
      <y>20</y>
      <width>121</width>
      <height>16</height>
     </rect>
    </property>
    <property name="text">
     <string>File Destination</string>
    </property>
   </widget>
   <widget class="QPushButton" name="ExitBut">
    <property name="geometry">
     <rect>
      <x>470</x>
      <y>10</y>
      <width>51</width>
      <height>22</height>
     </rect>
    </property>
    <property name="text">
     <string>Exit</string>
    </property>
   </widget>
   <widget class="QLabel" name="labelInfo">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>150</y>
      <width>481</width>
      <height>16</height>
     </rect>
    </property>
    <property name="text">
     <string>TextLabel</string>
    </property>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>528</width>
     <height>19</height>
    </rect>
   </property>
  </widget>
  <widget class="QToolBar" name="mainToolBar">
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
  </widget>
  <widget class="QStatusBar" name="statusBar"/>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections>
  <connection>
   <sender>destDialog</sender>
   <signal>clicked()</signal>
   <receiver>ddMainWindow</receiver>
   <slot>SaveDestFile()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>434</x>
     <y>87</y>
    </hint>
    <hint type="destinationlabel">
     <x>414</x>
     <y>111</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>ExitBut</sender>
   <signal>clicked()</signal>
   <receiver>ddMainWindow</receiver>
   <slot>ExitApp()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>496</x>
     <y>59</y>
    </hint>
    <hint type="destinationlabel">
     <x>498</x>
     <y>75</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>ddStopButton</sender>
   <signal>clicked()</signal>
   <receiver>ddMainWindow</receiver>
   <slot>ddStop()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>174</x>
     <y>114</y>
    </hint>
    <hint type="destinationlabel">
     <x>199</x>
     <y>122</y>
    </hint>
   </hints>
  </connection>
 </connections>
 <slots>
  <signal>changeVal(int,off_t)</signal>
  <slot>slotFillTable()</slot>
  <slot>SaveDestFile()</slot>
  <slot>ExitApp()</slot>
  <slot>ddStop()</slot>
  <slot>slotChangeVal(int,off_t)</slot>
 </slots>
</ui>